Trait LoadSources

pub trait LoadSources {
    type Artichoke;
    type Error;
    type Exception;

    // Required methods
    fn def_file_for_type<P, T>(&mut self, path: P) -> Result<(), Self::Error>
       where P: AsRef<Path>,
             T: File<Artichoke = Self::Artichoke, Error = Self::Exception>;
    fn def_rb_source_file<P, T>(
        &mut self,
        path: P,
        contents: T,
    ) -> Result<(), Self::Error>
       where P: AsRef<Path>,
             T: Into<Cow<'static, [u8]>>;
    fn resolve_source_path<P>(
        &self,
        path: P,
    ) -> Result<Option<Vec<u8>>, Self::Error>
       where P: AsRef<Path>;
    fn source_is_file<P>(&self, path: P) -> Result<bool, Self::Error>
       where P: AsRef<Path>;
    fn load_source<P>(&mut self, path: P) -> Result<Loaded, Self::Error>
       where P: AsRef<Path>;
    fn require_source<P>(&mut self, path: P) -> Result<Required, Self::Error>
       where P: AsRef<Path>;
    fn read_source_file_contents<P>(
        &self,
        path: P,
    ) -> Result<Cow<'_, [u8]>, Self::Error>
       where P: AsRef<Path>;
}

Load Ruby sources and Rust extensions into an interpreter.

Required Associated Types

type Artichoke

Concrete type for interpreter.

type Error

Concrete type for errors returned from file system IO.

type Exception

Concrete type for errors returned by File::require.

Required Methods

fn def_file_for_type<P, T>(&mut self, path: P) -> Result<(), Self::Error>

where P: AsRef<Path>, T: File<Artichoke = Self::Artichoke, Error = Self::Exception>,

Add a Rust extension hook to the virtual file system. A stub Ruby file is added to the file system and File::require will dynamically define Ruby items when invoked via Kernel#require.

If path is a relative path, the Ruby source is added to the file system relative to RUBY_LOAD_PATH. If the path is absolute, the file is placed directly on the file system. Ancestor directories are created automatically.

Errors

If the underlying file system is inaccessible, an error is returned.

If writes to the underlying file system fail, an error is returned.

fn def_rb_source_file<P, T>( &mut self, path: P, contents: T, ) -> Result<(), Self::Error>

where P: AsRef<Path>, T: Into<Cow<'static, [u8]>>,

Add a Ruby source to the virtual file system.

If path is a relative path, the Ruby source is added to the file system relative to RUBY_LOAD_PATH. If the path is absolute, the file is placed directly on the file system. Ancestor directories are created automatically.

Errors

If the underlying file system is inaccessible, an error is returned.

If writes to the underlying file system fail, an error is returned.

fn resolve_source_path<P>( &self, path: P, ) -> Result<Option<Vec<u8>>, Self::Error>

where P: AsRef<Path>,

Test for a source file at a path and return the absolute path of the resolved file.

Query the underlying virtual file system to check if path points to a source file.

This function returns None if path does not exist in the virtual file system.

Errors

If the underlying file system is inaccessible, an error is returned.

fn source_is_file<P>(&self, path: P) -> Result<bool, Self::Error>

where P: AsRef<Path>,

Test for a source file at a path.

Query the underlying virtual file system to check if path points to a source file.

This function returns false if path does not exist in the virtual file system.

Errors

If the underlying file system is inaccessible, an error is returned.

fn load_source<P>(&mut self, path: P) -> Result<Loaded, Self::Error>

where P: AsRef<Path>,

Load source located at the given path.

Query the underlying virtual file system for a source file and load it onto the interpreter. This loads files with the following steps:

1. Retrieve and execute the extension hook, if any.
2. Read file contents and eval them.

If this function returns without error, the feature specified by path is loaded, but is not added to $LOADED_FEATURES. This function is equivalent to Kernel#load.

Errors

If the underlying file system is inaccessible, an error is returned.

If reads to the underlying file system fail, an error is returned.

If path does not point to a source file, an error is returned.

If the source file at path has no contents, an error is returned.

fn require_source<P>(&mut self, path: P) -> Result<Required, Self::Error>

where P: AsRef<Path>,

Require source located at the given path.

Query the underlying virtual file system for a source file and require it onto the interpreter. This requires files with the following steps:

1. Retrieve and execute the extension hook, if any.
2. Read file contents and eval them.
3. Mark file as required and add to $LOADED_FEATURES.

If this function returns without error, the feature specified by path is loaded and added to $LOADED_FEATURES. This function is equivalent to Kernel#require.

Implementations should ensure that this method returns Ok(Required::Success) at most once. Subsequent Ok(_) return values should include Required::AlreadyRequired. See the documentation of Required for more details.

Errors

If the underlying file system is inaccessible, an error is returned.

If reads to the underlying file system fail, an error is returned.

If path does not point to a source file, an error is returned.

If the source file at path has no contents, an error is returned.

fn read_source_file_contents<P>( &self, path: P, ) -> Result<Cow<'_, [u8]>, Self::Error>

where P: AsRef<Path>,

Retrieve file contents for a source file.

Query the underlying virtual file system for the file contents of the source file at path.

Errors

If the underlying file system is inaccessible, an error is returned.

If reads to the underlying file system fail, an error is returned.

If path does not point to a source file, an error is returned.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors